Transmission-gear.



N0. 799,148. PATBNTED SEPT. 12, 1905. O. W. DAVIS. TRANSMISSION GEAR.

AFPLIGATION FILED 0012111904.

2 SHEETS-SHEET l wituesses flfl/fdW No. 799,149. PATENTED SEPT. 12,1905.

. 0. W. DAVIS.

a 9 TRANSMISSION GEAR;

APPLICATION FILED 001111904 2 SHEETS*SHEBT 2 witnesses gnucutm:

()RSON \V. DAVIS, OF ADRIAN, MICHIGAN.

TRANSMISSION-GEAR.

Specification of Letters Patent.

tar as.)

Patented Sept. 12, 1905.

Application filed October 17, 1904. Serial No. 228,726.

1'0 1/71/0721 if may concern.-

Be it known that I. ORSON \V. DAV'IS, a citizen of the United States,residing at Adrian, in the county of Lenawee, State of Michigan, haveinvented certain new and useful Improvements in Transmission-Gear; andldo declare the following to be a full, clear, and exact description ofthe invention, such as will enable others skilled in the art to which itappcrtains to make and use thesame, reference being bad to theaccompanying drawings, and to the ligures of reference marked thereon,which form a part of this specification.

This invention relates to a transmission-gear for motorvehicles; and itconsists in the construction and arrangement of parts hereinafter fullyset fortl1,and pointed out particularly in the claims.

The object of the invention is to provide a frictional transmission-gearwhich enables the motor or engine shaft to be connected directly orindirectly with the axle of the vehicle, which affords a differentialspeed, which allows the motion of the vehicle to be reversed, andaffords differential speed in the reversed position.

The above object is attained by the anism illustrated in theaccompanying ings, in which' Figure l is a plan view showing theapplication of my invention. Fig. 2 is a side elevation of the mechanismfor shifting the friction-disks. Fig. 3 is a plan View, partly inhorizontal section. Fig. 4 is an elevation of the face of one of themembers of the extension-collars which are employed to move thefriction-disks laterally. Fig. 5 is a side elevation of theextension-collar.

Referring to the characters of reference, 1 designates the motor shaft,upon which is mounted the balance or fly wheel 2. This wheel is providedupon its face with an outwardly-beveled friction-surface 3 and aninwardly-beveled friction-surface 4. The motor-shaft passes through thebalance-w heel and has a reduced end or tenon 5, which enters and turnsin a socket 6 in the end of the main shaft 7. The main shaft is providedwith a key-seat 8, and splined upon said shaft by means of a key in saidseatis a friction-wheel 9, having a beveled face 10, adapted to engagethe beveled face 4: of the fly-wheel to cause the shaft 7 to be drivendirectly from the motorshaft 1.

To provide for indirectly driving the shaft 7 at different speeds andreversing the motion mechd rawthereof, there are employed opposedfrictiondisks 11, each having a beveled outer face 12, adapted to run infrictional contact with the beveled face 3 of the balance-wheel, andhaving a straight friction-face 13, adapted to run in frictional contactwith the periphery 14E of the friction-wheel 9, which periphery iscomposed of suitable friction material. These disks 11 are mounted uponthe shafts 15, which run in suitable bearings on the frames 16, in whichsaid shafts are longitudinally movable. The disks 11 are moved towardand fromeach other by means of the expansion-collars on said shafts, themember 17 of which is provided with a ball-bearing 18 between its faceand the hub of the disk to receive. the thrust as the collar is expandedand the disk brought into frictional contact with the friction-wheel 9or the friction-face of the balance-wheel 2. The part 19 of thefriction-collar is provided with the inclined faces 20, which lit intothe corresponding inclines on the part 17, so that by partially rotatingthe part 19 said parts are separated to move the shaft longitudinallyand present it to the disk 13, as will be well understood.

To provide for rotating the part 19 of the expansion-collars, said partis provided with the projecting bracket 21, (see Fig. 2,) to which isattached one end of a connecting-rod 22, the other end of which ispivoted to the lever 23, the free end of which carries the foot-pedal24. By forcing said lever forward the bracket 21 is actuated topartially rotate the member 19 of the expansion collar, whereby theparts of said collar are separated, as before stated, and the disk 11projected. There will be one of the lovers 23 for each of the disks ll,so placed that said disks may be operated in unison to carry them intocontact with the friction-wheel 9. For the purpose of projecting thedisks forward so as to bring their beveled faces into frictional contactwith the beveled face 3 of the l.)alance-\vlieel 2 the frames 16,carrying the bearings of the shafts of said disks, are made to slideupon the main frame 25 by means of the slotted openings 26 therethrough,through which are passed the bolts 27. The sliding movement of theframes 16 is accomplished through the medium of the adjustable lug 28 onthe main frame, which is adapted to be engaged by the projecting car 529on the member 19 of the expansion-collars, the operation being asfollows: The first forward movement of the lever 23 will rotate themembers 19 of the expansioncollars sufliciently to project the disks 11into contact with the periphery of the frictionwheel 9, when a furthermovement of said lever will cause the ears 29 to engage the lugs 28,arresting the rotary movement of the members 19 of the collars andcausing a further pressure upon the levers 23 to move the frames 16,thereby sliding the disks 11 into contact with the beveled face of thebalancewheel 2, causing the disks 11 to revolve in opposite directionsand driving the frictionwheel 9 and causing a rotation of the shaft 7 Tovary the speed of shaft 7, the wheel 9 is moved upon said shaft throughthe medium of the pull-rods 30, which are connected to a ring 31, lyingin an annular channel in the hub 32 of the wheel 9, whereby said wheelmay be moved upon the shaft 7 across the face of the disks 11. It willbe obvious when said wheel 9 is at the center of the disks 11 nomovement will be imparted theretothrough said disks; but as it is movedoutwardly from the center ineither direction the speed at which saidwheel is rotated will be gradually increased and that the direction, ofrotation will be reversed as said wheel is moved from one side ofthecenter of said disks to the other.

- By this arrangement the vehicle may be driven at any rate of speed,either backward or forward, and when desired the disks 11 may bereleased and shaft 7 driven directly by moving the wheel 9 forward, soas to cause its beveled face 10 to engage the corresponding beveled face4 of balance-wheel 2, whereby the motor-shaft 1 and the shaft 7 becomedirectly coupled through the balance-wheel.

To retract the friction-disks 11, there is employed upon the shaft ofeach a coiled spring 33, which bears against the frame at one end and atthe other end is confined by a collar 34% on said shaft. The springs arecompressed when the disks are projected, and the tension thereof servesto retract the disks when the expansion-collars are released.

In Fig. 1, 35 designates a gasolene-engine of the ordinary typeconnected to the shaft 1.

Having thus fully set forth my invention, what I claim as new, anddesire to secure by Letters Patent, is

1. In a transmission-gear, the combination of the motor-shaft, a wheelfixed thereon provided with a friction-face, the main shaft rotatableindependently of the motor-shaft, a friction-wheel splined to the mainshaft and having a friction-face adapted to be carried into contact withthe friction-face of wheel on the motor-shaft, a transmittingfrictiondisk having two friction-faces, said disk being movable in twodirections to cause its frictionfaces to concurrently engage thefrictionwheel on the motor-shaft and the frictionwheel on the main shaftrespectively.

2. In a transmission-gear, the combination of the motor-driven shaft, awheel upon the motor-shaft having an inner friction-surface, the mainshaft connected to but rotatable independently of the motor-shaft, africtionwheel splined on the main shaft having a friction-surfaceadapted to engage the inner friction-surface of the wheel on themotorshaft, a movable friction-disk located at right angles to thefriction-wheel on the main shaft, and adapted to be brought intoengagement therewith, said movable disk having a beveled friction-faceadapted to be brought into engagement with a corresponding face on thewheel of'the motor-shaft, whereby the main shaft may be driven directlyat a fixed speed and indirectly at a variable speed.

3. In a transmission-gear, the combination of the motor-driven shaft, awheel fixed thereon, a main shaft rotatable independently of the motorshaft, a movable friction wheel splined to the main shaft and adapted toengage the wheel on the motor-shaft t0 establish a direct communicationbetween said shafts, the wheel on the motor-shaft having anoutwardly-beveled friction-face, opposed movable friction-disks eachhaving a beveled face adapted to engage the beveled face of the wheel onthe motor-shaft and each having a straight face adapted to engage theperiphery of the friction-wheel on the main shaft, and means foractuating said disks.

4. In a transmission-gear, the combination of the motor-driven shaft, abalance-wheel thereon provided with an inwardly-beveled friction surfaceand an outwardly beveled friction face, a main shaft rotatableindependently of the motor -shaft, a frictionwheel splined to the mainshaft having a beveled friction-face adapted to engage the innerfriction-surface of the fly-Wheel on the motorshaft, and having aperipheral frictional surface, opposed friction-disks, shaftslongitudinally movable in their bearings upon which said disks aremounted, each disk having a beveled frictional surface adapted to engagethe beveled friction-face of the wheel on the motor-shaft, expansiblecollars for projecting said disks to carry their straight faces intocontact with the periphery of the wheel on the main shaft, a movableframe carrying the shaft of each of the frictional disks, and means formoving said frames to carry the beveled face of the frictional disksinto contact with the outwardly-beveled frictional face of the wheel onthe motor-shaft.

In testimony whereof I sign this specification' in the presence of twowitnesses.

ORSON W. DAVIS. Witnesses:

JNo. D. LYNN, CHARLES A. ROLFE.

